<template>
    <div class="detail">
      <Header/>
      <div class="main">
        <div class="course-info">
          <div class="wrap-left">
<!--            <video controls width="100%" src="/static/image/xx.mp4"></video>-->
            <videoPlayer class="video-player vjs-custom-skin"
               ref="videoPlayer"
               :playsinline="true"
               :options="playerOptions"
               @play="onPlayerPlay($event)"
               @pause="onPlayerPause($event)">

            </videoPlayer>

          </div>
          <div class="wrap-right">
            <h3 class="course-name">{{detail_data.name}}</h3>
            <p class="data">{{detail_data.students}}人在学&nbsp;&nbsp;&nbsp;&nbsp;课程总时长：{{detail_data.pub_lessons}}课时/{{detail_data.lessons}}小时&nbsp;&nbsp;&nbsp;&nbsp;难度：{{detail_data.level_name}}</p>
            <div class="sale-time">
              <p class="sale-type">{{detail_data.discount_name}}</p>
              <p class="expire">距离结束：仅剩 {{ detail_data.activity_left_time / 60 / 60 / 24 | zhuanint}}天
                {{ detail_data.activity_left_time / 60 / 60 % 24 | zhuanint}}小时
                {{ detail_data.activity_left_time / 60 % 60 | zhuanint}}分
                <span class="second">{{ detail_data.activity_left_time % 60 | zhuanint}}</span> 秒</p>
<!--              <p class="expire">距离结束：仅剩 {{detail_data.activity_left_time}}秒</p>-->
            </div>
            <p class="course-price">
              <span>活动价</span>
              <span class="discount">¥{{detail_data.real_price}}</span>
              <span class="original">¥{{detail_data.price}}</span>
            </p>
            <div class="buy">
              <div class="buy-btn">
                <button class="buy-now">立即购买</button>
                <button class="free">免费试学</button>
              </div>
              <div class="add-cart" @click="add_cart"><img src="/static/image/cart-yellow.svg" alt="">加入购物车</div>
            </div>
          </div>
        </div>
        <div class="course-tab">
          <ul class="tab-list">
            <li :class="tabIndex==1?'active':''" @click="tabIndex=1">详情介绍</li>
            <li :class="tabIndex==2?'active':''" @click="tabIndex=2">课程章节 <span :class="tabIndex!=2?'free':''">(试学)</span></li>
            <li :class="tabIndex==3?'active':''" @click="tabIndex=3">用户评论 (42)</li>
            <li :class="tabIndex==4?'active':''" @click="tabIndex=4">常见问题</li>
          </ul>
        </div>
        <div class="course-content">
          <div class="course-tab-list">
            <div class="tab-item" v-if="tabIndex==1" v-html="detail_data.join_brief">
<!--              {{detail_data.brief}}   -->
            </div>
            <div class="tab-item" v-if="tabIndex==2">
              <div class="tab-item-title">
                <p class="chapter">课程章节</p>
                <p class="chapter-length">共{{chapter_data.length}}章 {{detail_data.pub_lessons}}个课时</p>
              </div>
              <div class="chapter-item" v-for="(chapter_value,chapter_index) in chapter_data">
                <p class="chapter-title"><img src="/static/image/avatar1.svg" alt="">第{{chapter_value.chapter}}章·{{chapter_value.name}} </p>
                <ul class="lesson-list">
                  <li class="lesson-item" v-for="(lesson_value,lesson_index) in chapter_value.coursesections">
                    <p class="name"><span class="index">{{chapter_value.chapter}}-{{lesson_value.lesson}}</span> 课程介绍-{{lesson_value.name}}<span class="free" v-if="lesson_value.free_trail">免费</span></p>
                    <p class="time">{{lesson_value.duration}} <img src="/static/image/chapter-player.svg"></p>
                    <button class="try" v-if="lesson_value.free_trail" ><router-link :to="'/player/'+lesson_value.section_link+'/'">立即试学</router-link></button>
                    <button class="try" v-else>立即购买</button>
                  </li>

                </ul>
              </div>

            </div>
            <div class="tab-item" v-if="tabIndex==3">

              用户评论
            </div>
            <div class="tab-item" v-if="tabIndex==4">
              常见问题
            </div>
          </div>
          <div class="course-side">
             <div class="teacher-info">
               <h4 class="side-title"><span>授课老师</span></h4>
               <div class="teacher-content">
                 <div class="cont1">
                   <img :src="detail_data.teacher.image">
                   <div class="name">
                     <p class="teacher-name">{{detail_data.teacher.name}}</p>
                     <p class="teacher-title">{{detail_data.teacher.title}}</p>
                   </div>
                 </div>
                 <p class="narrative" >{{detail_data.teacher.brief}}</p>
               </div>
             </div>
          </div>
        </div>
      </div>
      <Footer/>
    </div>
</template>

<script>
import Header from "./common/Header"
import Footer from "./common/Footer"
import {videoPlayer} from 'vue-video-player';

export default {
    name: "CourseDetail",
    data(){
      return {
        course_id: 0,
        tabIndex:2, // 当前选项卡显示的下标
        detail_data:{
          teacher:{}
        },
        cart_length:0,
        chapter_data:{},
        playerOptions: {
          playbackRates: [0.7, 1.0, 1.5, 2.0], // 播放速度
          autoplay: false, //如果true,则自动播放
          muted: false, // 默认情况下将会消除任何音频。
          loop: false, // 循环播放
          preload: 'auto',  // 建议浏览器在<video>加载元素后是否应该开始下载视频数据。auto浏览器选择最佳行为,立即开始加载视频（如果浏览器支持）
          language: 'zh-CN',
          aspectRatio: '16:9', // 将播放器置于流畅模式，并在计算播放器的动态大小时使用该值。值应该代表一个比例 - 用冒号分隔的两个数字（例如"16:9"或"4:3"）
          fluid: true, // 当true时，Video.js player将拥有流体大小。换句话说，它将按比例缩放以适应其容器。
          sources: [{ // 播放资源和资源格式
            type: "video/mp4",
            src: "../../static/image/xx.mp4" //你的视频地址（必填）
          }
          ],
          poster: "../../static/image/course-cover.jpeg", //视频封面图
          width: document.documentElement.clientWidth, // 默认视频全屏时的最大宽度
          notSupportedMessage: '此视频暂无法播放，请稍后再试', //允许覆盖Video.js无法播放媒体源时显示的默认信息。
        }
      }
    },
  // vue过滤器
    filters:{
      zhuanint(val){
        let t = parseInt(val);
        if (t < 10){
          t = `0${t}`;
        }
        return t
      }
    },
    created(){
      // 课程ID
      this.get_course_id();
      this.get_course_detail_data();
      this.get_chapter_data();
      this.daojishi();
    },
    methods: {
      daojishi(){
        let t = setInterval(()=>{
          if (this.detail_data.activity_left_time > 1){
            this.detail_data.activity_left_time--;
          }else {
            clearInterval(t);
          }
        }, 1000)
      },
      // 添加购物车
      add_cart(){
        if (localStorage.token){
          this.token = localStorage.token
          this.where = 1;
        }
        else if (sessionStorage.token){
          this.token = sessionStorage.token
          this.where = 0;
        }else {
          this.$message.warning("please login first")
          return false;
        }
        // this.token = localStorage.token || sessionStorage.token;
        // 异步动作
        this.$axios.post(`${this.$settings.host}/users/verify_token/`,{
          token:this.token,
        })
        .then((res)=>{
          // console.log('oooooo')
          if (this.where === 0){
            sessionStorage.token = res.data.token;
            this.token =  res.data.token;
          }else {
            localStorage.token = res.data.token;
            this.token =  res.data.token;
          }
          // return res.data.token


          this.$axios.post(`${this.$settings.host}/cart/list/`,{
            course_id: this.course_id,
          },{
            headers:{  // 添加请求头
              'authorization': `jwt ${this.token}`,
            }
          }).then((res)=>{
            this.$message.success(res.data.msg);
            this.cart_length = res.data.cart_len;
            this.$store.commit('add_cart', this.cart_length);
          }).catch((error)=>{
            this.$message.error(error.response.data.error)
            this.cart_length = error.response.data.cart_len;
          });

        })
        .catch((error)=>{
          this.$confirm('请重新登录', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).then(() => {
            this.$router.push('/login');
          }).catch(()=>{
            this.token = false;
          })
          return false
        })
        // console.log('xxxxxxx')

      },




      onPlayerPlay(){
        alert('开始播放啦，你先冲会员')
      },
      onPlayerPause(){
        alert('暂停播放啦，看会广告吧')
      },

      // 获取本课程所有章节和课时数据
      get_chapter_data(){
        this.$axios.get(`${this.$settings.host}/course/chapter/`,{
          params:{
            course:this.course_id,
          }
        }).then((res)=>{
          this.chapter_data = res.data;

        }).catch((error)=>{
          this.$message.error('获取章节信息数据失败')
        })
      },

      // 获取课程详情数据
      get_course_detail_data(){
        this.$axios.get(`${this.$settings.host}/course/detail/${this.course_id}/`)
        .then((res)=>{
          this.detail_data = res.data;
        })
        .catch((error)=>{
          this.$message.error('数据有无')
        })

      },

      // 获取课程id值
      get_course_id(){

        let course_id = this.$route.params.id;
        let renum = /^\d+$/;

        if (!renum.test(course_id)){
          this.$router.go(-1);  // 跳转回上一个页面
        }
        this.course_id = course_id;

      },

    },
    components:{
      Header,
      Footer,
      videoPlayer, // 注册组件
    }
}
</script>

<style scoped>
.main{
  background: #fff;
  padding-top: 30px;
}
.course-info{
  width: 1200px;
  margin: 0 auto;
  overflow: hidden;
}
.wrap-left{
  float: left;
  width: 690px;
  height: 388px;
  background-color: #000;
}
.wrap-right{
  float: left;
  position: relative;
  height: 388px;
}
.course-name{
  font-size: 20px;
  color: #333;
  padding: 10px 23px;
  letter-spacing: .45px;
}
.data{
  padding-left: 23px;
  padding-right: 23px;
  padding-bottom: 16px;
  font-size: 14px;
  color: #9b9b9b;
}
.sale-time{
  width: 464px;
  background: #fa6240;
  font-size: 14px;
  color: #4a4a4a;
  padding: 10px 23px;
  overflow: hidden;
}
.sale-type {
  font-size: 16px;
  color: #fff;
  letter-spacing: .36px;
  float: left;
}
.sale-time .expire{
  font-size: 14px;
  color: #fff;
  float: right;
}
.sale-time .expire .second{
  width: 24px;
  display: inline-block;
  background: #fafafa;
  color: #5e5e5e;
  padding: 6px 0;
  text-align: center;
}
.course-price{
  background: #fff;
  font-size: 14px;
  color: #4a4a4a;
  padding: 5px 23px;
}
.discount{
  font-size: 26px;
  color: #fa6240;
  margin-left: 10px;
  display: inline-block;
  margin-bottom: -5px;
}
.original{
  font-size: 14px;
  color: #9b9b9b;
  margin-left: 10px;
  text-decoration: line-through;
}
.buy{
  width: 464px;
  padding: 0px 23px;
  position: absolute;
  left: 0;
  bottom: 20px;
  overflow: hidden;
}
.buy .buy-btn{
  float: left;
}
.buy .buy-now{
  width: 125px;
  height: 40px;
  border: 0;
  background: #ffc210;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  margin-right: 15px;
  outline: none;
}
.buy .free{
  width: 125px;
  height: 40px;
  border-radius: 4px;
  cursor: pointer;
  margin-right: 15px;
  background: #fff;
  color: #ffc210;
  border: 1px solid #ffc210;
}
.add-cart{
  float: right;
  font-size: 14px;
  color: #ffc210;
  text-align: center;
  cursor: pointer;
  margin-top: 10px;
}
.add-cart img{
  width: 20px;
  height: 18px;
  margin-right: 7px;
  vertical-align: middle;
}

.course-tab{
    width: 100%;
    background: #fff;
    margin-bottom: 30px;
    box-shadow: 0 2px 4px 0 #f0f0f0;

}
.course-tab .tab-list{
    width: 1200px;
    margin: auto;
    color: #4a4a4a;
    overflow: hidden;
}
.tab-list li{
    float: left;
    margin-right: 15px;
    padding: 26px 20px 16px;
    font-size: 17px;
    cursor: pointer;
}
.tab-list .active{
    color: #ffc210;
    border-bottom: 2px solid #ffc210;
}
.tab-list .free{
    color: #fb7c55;
}
.course-content{
    width: 1200px;
    margin: 0 auto;
    background: #FAFAFA;
    overflow: hidden;
    padding-bottom: 40px;
}
.course-tab-list{
    width: 880px;
    height: auto;
    padding: 20px;
    background: #fff;
    float: left;
    box-sizing: border-box;
    overflow: hidden;
    position: relative;
    box-shadow: 0 2px 4px 0 #f0f0f0;
}
.tab-item{
    width: 880px;
    background: #fff;
    padding-bottom: 20px;
    box-shadow: 0 2px 4px 0 #f0f0f0;
}
.tab-item-title{
    justify-content: space-between;
    padding: 25px 20px 11px;
    border-radius: 4px;
    margin-bottom: 20px;
    border-bottom: 1px solid #333;
    border-bottom-color: rgba(51,51,51,.05);
    overflow: hidden;
}
.chapter{
    font-size: 17px;
    color: #4a4a4a;
    float: left;
}
.chapter-length{
    float: right;
    font-size: 14px;
    color: #9b9b9b;
    letter-spacing: .19px;
}
.chapter-title{
    font-size: 16px;
    color: #4a4a4a;
    letter-spacing: .26px;
    padding: 12px;
    background: #eee;
    border-radius: 2px;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-align: center;
    align-items: center;
}
.chapter-title img{
    width: 18px;
    height: 18px;
    margin-right: 7px;
    vertical-align: middle;
}
.lesson-list{
    padding:0 20px;
}
.lesson-list .lesson-item{
    padding: 15px 20px 15px 36px;
    cursor: pointer;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}
.lesson-item .name{
    font-size: 14px;
    color: #666;
    float: left;
}
.lesson-item .index{
    margin-right: 5px;
}
.lesson-item .free{
    font-size: 12px;
    color: #fff;
    letter-spacing: .19px;
    background: #ffc210;
    border-radius: 100px;
    padding: 1px 9px;
    margin-left: 10px;
}
.lesson-item .time{
    font-size: 14px;
    color: #666;
    letter-spacing: .23px;
    opacity: 1;
    transition: all .15s ease-in-out;
    float: right;
}
.lesson-item .time img{
    width: 18px;
    height: 18px;
    margin-left: 15px;
    vertical-align: text-bottom;
}
.lesson-item .try{
    width: 86px;
    height: 28px;
    background: #ffc210;
    border-radius: 4px;
    font-size: 14px;
    color: #fff;
    position: absolute;
    right: 20px;
    top: 10px;
    opacity: 0;
    transition: all .2s ease-in-out;
    cursor: pointer;
    outline: none;
    border: none;
}
.lesson-item:hover{
    background: #fcf7ef;
    box-shadow: 0 0 0 0 #f3f3f3;
}
.lesson-item:hover .name{
    color: #333;
}
.lesson-item:hover .try{
    opacity: 1;
}

.course-side{
    width: 300px;
    height: auto;
    margin-left: 20px;
    float: right;
}
.teacher-info{
    background: #fff;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px 0 #f0f0f0;
}
.side-title{
    font-weight: normal;
    font-size: 17px;
    color: #4a4a4a;
    padding: 18px 14px;
    border-bottom: 1px solid #333;
    border-bottom-color: rgba(51,51,51,.05);
}
.side-title span{
    display: inline-block;
    border-left: 2px solid #ffc210;
    padding-left: 12px;
}

.teacher-content{
    padding: 30px 20px;
    box-sizing: border-box;
}

.teacher-content .cont1{
    margin-bottom: 12px;
    overflow: hidden;
}

.teacher-content .cont1 img{
    width: 54px;
    height: 54px;
    margin-right: 12px;
    float: left;
}
.teacher-content .cont1 .name{
    float: right;
}
.teacher-content .cont1 .teacher-name{
    width: 188px;
    font-size: 16px;
    color: #4a4a4a;
    padding-bottom: 4px;
}
.teacher-content .cont1 .teacher-title{
    width: 188px;
    font-size: 13px;
    color: #9b9b9b;
    white-space: nowrap;
}
.teacher-content .narrative{
    font-size: 14px;
    color: #666;
    line-height: 24px;
}
</style>
